Feature
●Model: 5#--9# Mohs hardness
●Size: pen 100x6mm; box 150x100mm
●Material: pen point(5 # Apatite; 6 # Orthoclase; 7 # Quartz; 8 # Topaz; 9 # Corundum)
●Weight: pen7.8g, total weight 221g
Description
